The Great Barrier Reef Marine Park Authority ... in which corals lose their color after expelling the one-celled algae that live within their tissues. This is a sign of stress, and it can kill ...

Without this algae, the coral can't get the nutrients ... Narrator: In 2016 and 2017, the Great Barrier Reef was hit with a massive marine heat wave, leading to the longest coral-bleaching events ...

As those algae photosynthesize—using light to ... and there's no reef at all. "In the Great Barrier Reef, corals set the patterns of life from end to end," says Charlie Veron, coral expert ...

Local activity has contributed to damage of the Great Barrier Reef and other reefs. Runoff and pollution from agriculture have damaged the reef, allowing harmful types of algae and predatory ...

Australian scientists have reported the sixth mass coral bleaching event on the Great Barrier Reef since 2016. In a ...

Two iconic Australian reefs face simultaneous coral bleaching, highlighting urgent threats to ocean ecosystems ...

The Great Barrier Reef is bleaching too in the waters from ... coral polyps expel their symbiotic zooxanthellae algae. They appear to do this to avoid further tissue damage from toxic reactive ...

"The Great Barrier Reef is still a resilient system... and herbivorous fish play a critical role in that regenerative capacity, by keeping the dead coral space free of algae, so that new juvenile ...

A research outpost on the Great Barrier Reef has long been at the centre of the fight to preserve the world heritage area.

As coral bleaching and deaths become more widespread globally, experts are re-evaluating the benefits of restoration missions ...